CQ Amateur Radio

math’s notes

While purchasing batteries for my HT and some battery powered test equipment I have often wished that I could just plug them into the AC line and forget about the batteries, especially for non-portable devices. This month I will show you an interesting way that I used to solved the problem.

The main item that sparked all of this was a new telephone I bought for my shack. This was a beautiful land-line–a Panasonic model which had

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